Dogs can swim while "sitting"

Dogs can "swim" if they are sitting and pushed into some water. Once you save and reopen the game, they can swim while sitting.

To Reproduce:

1. Get a wolf and tame it or use an existing dog
2. Make it sit by right-clicking on it
3. Find some water nearby and push the dog in the water or create a small body of water
4. The dog should now stand.
5. Save the game and go back into the world.
6. The wolf should be sitting, and it can still move.